Confined Formation of Ultrathin ZnO Nanorods/Reduced Graphene Oxide Mesoporous Nanocomposites for High-Performance Room-Temperature NO2 Sensors

• DOI: 10.1021/acsami.6b12501
• Publication Date: 2016-12-01T18:15:29Z
• Authors: Yi Xia; Jing Wang; Jian-Long Xu; Xian Li; Dan Xie; Lan Xiang; Sridhar Komarneni
• Keywords: Nanorod

Here we demonstrate high-performance room-temperature NO2 sensors based on ultrathin ZnO nanorods/reduced graphene oxide (rGO) mesoporous nanocomposites. Ultrathin nanorods were loaded rGO nanosheets by a facile two-step additive-free solution synthesis involving anchored seeding followed oriented growth. The nanorod diameters simply controlled the seed associated with spatial confinement effects of (GO) nanosheets. Compared to solely and rGO-based sensors, optimal sensor nanorods/rGO nanocomposites exhibited higher sensitivity quicker p-type response parts per million level at room temperature, 1 ppm was 119% recovery time being 75 132 s. Moreover, full reversibility, excellent selectivity, low detection limit (50 ppb) temperature. In addition high transport capability as well adsorption ability derived from structures, superior sensing performance attributed synergetic effect rGO, which realized electron transfer across ZnO–rGO interfaces through band energy alignment.